Poprawa sprawności scentralizowanych systemów ciepłowniczych przez doskonalenie metod regulacji

Shkarovskiy, Alexander; Janta-Lipińska, S.; Kollienko, Anatoliy; Koliienko, Volodymyr

doi:10.15199/9.2016.9.1

Cited by 4 publications

(5 citation statements)

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“…We already demonstrated that operation in this period is associated with excessive heating (overheating of premises) and significant inefficient heat losses (Szkarowski et al, 2016). In this case, a decrease in the network heat carrier temperature leads to a decrease in the external temperature, which results in the mentioned corner of the temperature curve, an increase in the duration of system operation in the excessive heating mode, and an increase in inefficient heat losses.…”

Section: Subject Tasks and Methodsmentioning

confidence: 93%

Increasing the Efficiency of Heat Load Control in Centalized Heating Networks

Shkarovskiy

Kolienko

Turchenko

2021

AEJ

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The paper presents the results of studies aimed to increase the efficiency of centralized heating networks by improving heat supply control at the plant and at the local level. With this in view, we considered issues of choosing the optimal heat supply schedule and its influence on the efficiency of heat generation, transportation and use, as well as the influence of the heat carrier temperature on heat losses at the corner of the temperature curve. We also studied the influence of the heat carrier temperature in the return pipe of heating networks on the operation of heat generators by using various control methods. Another issue considered in the course of the study was the issue of ensuring the hydraulic and thermal stability of heating networks and heating systems connected to them by using the combined control method. The methodology of the study was based on the analysis of heat balance equations for the steady-state operation of a complex including a heating network and a building’s heating system. As a result, we obtained relationships that make it possible to determine the variation in the heat carrier flow rate and temperature depending on the heat load, as well as the reduction in energy consumption for heat carrier transportation. Recommendations were developed for the introduction of combined heat load control. A scheme for the reconstruction of central heat stations is proposed. The scientific and practical results of the study can be used to prevent significant heat losses, ensure optimal operation of heating networks, heat generators, and heating systems, reduce energy consumption, and increase the overall efficiency of centralized heating networks.

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Section: Subject Tasks and Methodsmentioning

confidence: 93%

Increasing the Efficiency of Heat Load Control in Centalized Heating Networks

Shkarovskiy

Kolienko

Turchenko

2021

AEJ

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Section: Subject Tasks and Methodsmentioning

confidence: 93%

Untitled

2021

AEJ

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Introduction:In the course of the study, we examined energy-efficient and environmentally friendly heat-insulating materials based on gypsum and gypsum-containing primary components. Purpose of the study: We aimed to assess the effectiveness of using gypsum materials in wall structures, by using the finite element method based on the ANSYS Steady State Thermal module. Porous materials of different densities (structural, structural and heat-insulating, and heatinsulating gypsum concrete) were used as wall materials. These materials were obtained as a result of the interaction between residual sulfuric acid adsorbed on the grains of "acidic" fluoroanhydrite and carbonate flour. Methods: The finite element method based on the ANSYS Steady State Thermal module was used. The thermal conductivity of the structures was evaluated in a three-dimensional coordinate system. The experimental values of thermal and physical characteristics were adopted for the walling fragments. Results: The problem was solved numerically, by using the finite element method based on the ANSYS Steady State Thermal module. We established that the developed structural and heat-insulating gypsum concrete is more effective since, under the set design conditions, the temperature of the inner surface of such a wall at the minimum (510 mm) and maximum (770 mm) structure thickness exceeds the temperature of the inner surface of walls made of different materials.

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“…It is limited only by technical requirements (safety of equipment, plants, works of art in museums, etc.) [6]. If there are no special requirements, then it is important to prevent moisture condensation on the enclosing structures.…”

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency of Non-Stationary Climate Control in Buildings with a Non-Constant Stay of People by Using Porous Materials

Shkarovskiy

Mamedov

2021

Materials

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This article presents the results of experimental research on the non-stationary management of the internal climate of buildings with a non-constant stay of people. During the absence of people, a significant drop in air temperature and corresponding energy conservation in heating is possible. The effectiveness of porous building materials is shown, provided that the appropriate characteristics are selected. Daily fluctuations in the outside temperature are completely extinguished by a layer of foam polystyrene insulation. The absence of channel porosity in the structural material of the wall is a guarantee of the stability of its thermal and humidity regime. This, in turn, prevents the development of mold and mildew.

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Poprawa sprawności scentralizowanych systemów ciepłowniczych przez doskonalenie metod regulacji

Cited by 4 publications

References 0 publications

Increasing the Efficiency of Heat Load Control in Centalized Heating Networks

Increasing the Efficiency of Heat Load Control in Centalized Heating Networks

Untitled

Improving the Efficiency of Non-Stationary Climate Control in Buildings with a Non-Constant Stay of People by Using Porous Materials

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